Open and close animation for trampoline task

Moving most of the logic from DesktopAppLaunchTransition to DesktopAppLaunchAnimatorHelper to make it more testable

Bug: 391548553
Flag: com.android.window.flags.enable_desktop_trampoline_close_animation_bugfix
Test: DesktopAppLaunchAnimatorHelperTest

Change-Id: I606fc3fc25250ea4128f3089b701a1ae153dc47a
6 files changed